1. Department of Ophthalmology, Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru
2. Department of Ophthalmology, Hospital Universitario de Bellvitge, Barcelona, Spain
3. Department of Medicine, Indiana University School of Medicine, Indianapolis, USA
4. Cornea and External Diseases Service, Department of Ophthalmology, Hospital Nacional Edgardo Rebagliati Martins, Lima, Peru
5. Centro Oftalmológico Virgilio Galvis, Floridablanca, Colombia
6. Department of Ophthalmology, Universidad Autónoma de Bucaramanga UNAB, Bucaramanga, Colombia
7. Department of Ophthalmology, Fundación Oftalmológica de Santander FOSCAL, Floridablanca, Colombia